NA49/28UU Machined Needle Roller Bearing, 28 mm ID x 45 mm OD x 17 mm Width, High Carbon Steel Inner Ring, Oil Hole, Sealed Synthetic Rubber, Caged Metric Bearing, Single Piece

Machined NA49/28UU needle bearing, 28x45x17 mm single
✔️ 28 mm ID, 45 mm OD, 17 mm W; sealed, oil hole, high carbon steel

This single machined needle roller bearing with inner ring is built for tight radial applications like transmissions, gearboxes, and linear slide units where space is limited and load capacity matters.

✅ Model NA49/28UU, machined caged needle roller, inner ring included
✅ Dimensions: 28 mm ID x 45 mm OD x 17 mm width
✅ Material: high carbon steel, sealed with synthetic rubber, oil hole present
✅ Load ratings: dynamic 21000 N, static 26800 N; max 6000 rpm
✅ Fits compact radial and linear slide unit setups; good alternative to sealed ball bearing
✅ Single piece pack, metric series NA49, SKU 862768, weight 1.0 lb

💡 What is a needle roller bearing used for in compact linear motion systems? Needle roller bearings support high radial loads in tight spaces and reduce friction for short-stroke motion. They are handy for engineers and technicians working on compact assemblies: - High radial load capacity for shafts in transmissions and gearboxes, acting like sealed ball bearing replacements for tight fits - Works well with linear slide unit setups and short-stroke actuators where space is limited - Can be paired or substituted with ceramic elements for lower friction and higher speed requirements